1 /*
2  *  Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
3  *
4  *  Use of this source code is governed by a BSD-style license
5  *  that can be found in the LICENSE file in the root of the source
6  *  tree. An additional intellectual property rights grant can be found
7  *  in the file PATENTS.  All contributing project authors may
8  *  be found in the AUTHORS file in the root of the source tree.
9  */
10 
11 #include "api/audio_codecs/L16/audio_decoder_L16.h"
12 
13 #include <memory>
14 
15 #include "absl/strings/match.h"
16 #include "modules/audio_coding/codecs/pcm16b/audio_decoder_pcm16b.h"
17 #include "modules/audio_coding/codecs/pcm16b/pcm16b_common.h"
18 #include "rtc_base/numerics/safe_conversions.h"
19 
20 namespace webrtc {
21 
SdpToConfig(const SdpAudioFormat & format)22 absl::optional<AudioDecoderL16::Config> AudioDecoderL16::SdpToConfig(
23     const SdpAudioFormat& format) {
24   Config config;
25   config.sample_rate_hz = format.clockrate_hz;
26   config.num_channels = rtc::checked_cast<int>(format.num_channels);
27   return absl::EqualsIgnoreCase(format.name, "L16") && config.IsOk()
28              ? absl::optional<Config>(config)
29              : absl::nullopt;
30 }
31 
AppendSupportedDecoders(std::vector<AudioCodecSpec> * specs)32 void AudioDecoderL16::AppendSupportedDecoders(
33     std::vector<AudioCodecSpec>* specs) {
34   Pcm16BAppendSupportedCodecSpecs(specs);
35 }
36 
MakeAudioDecoder(const Config & config,absl::optional<AudioCodecPairId>)37 std::unique_ptr<AudioDecoder> AudioDecoderL16::MakeAudioDecoder(
38     const Config& config,
39     absl::optional<AudioCodecPairId> /*codec_pair_id*/) {
40   return config.IsOk() ? std::make_unique<AudioDecoderPcm16B>(
41                              config.sample_rate_hz, config.num_channels)
42                        : nullptr;
43 }
44 
45 }  // namespace webrtc
46